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Seasonality, biting cycle and parity of the yellow fever vector mosquito Haemagogus janthinomys in Trinidad.
Med Vet Entomol. 1992 Apr; 6(2):143-8.MV

Abstract

1. Age composition, seasonal abundance and diel patterns of landing activity of the sylvan vector of yellow fever Haemagogus janthinomys Dyar were monitored weekly during 1981-82 by human collectors on the ground at Point Gourde in Chaguaramas Forest, 16 km west of Port of Spain, Trinidad. 2. Landing collections of Hg. janthinomys showed only diurnal activity, from 06.00 to 18.00 (sunrise to sunset, universal time), with a single peak of activity between 10.00 and 16.00 hours. 3. Densities of Hg. janthinomys were about 6 times greater during the wet season (May-November) than during the dry season (December-April); the annual Williams' mean landing rate on two collectors was 9.3 per day. 4. Monthly parous rates averaged 59% (range 0-86%) and some females were up to seven-pars. Retained eggs (range 1-21, mean 7.7/female) were found in the ovaries of 1.3% of landing females, all of which had stage I ovarian follicles for the next gonotrophic cycle. Hence blood-feeding is not inhibited by egg retention, which might promote transovarial transmission of virus. Implications of these findings are discussed in relation to yellow fever epidemiology.

Authors+Show Affiliations

Insect Vector Control Division, Ministry of Health, St Joseph, Trinidad.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

1358266

Citation

Chadee, D D., et al. "Seasonality, Biting Cycle and Parity of the Yellow Fever Vector Mosquito Haemagogus Janthinomys in Trinidad." Medical and Veterinary Entomology, vol. 6, no. 2, 1992, pp. 143-8.
Chadee DD, Tikasingh ES, Ganesh R. Seasonality, biting cycle and parity of the yellow fever vector mosquito Haemagogus janthinomys in Trinidad. Med Vet Entomol. 1992;6(2):143-8.
Chadee, D. D., Tikasingh, E. S., & Ganesh, R. (1992). Seasonality, biting cycle and parity of the yellow fever vector mosquito Haemagogus janthinomys in Trinidad. Medical and Veterinary Entomology, 6(2), 143-8.
Chadee DD, Tikasingh ES, Ganesh R. Seasonality, Biting Cycle and Parity of the Yellow Fever Vector Mosquito Haemagogus Janthinomys in Trinidad. Med Vet Entomol. 1992;6(2):143-8. PubMed PMID: 1358266.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonality, biting cycle and parity of the yellow fever vector mosquito Haemagogus janthinomys in Trinidad. AU - Chadee,D D, AU - Tikasingh,E S, AU - Ganesh,R, PY - 1992/4/1/pubmed PY - 1992/4/1/medline PY - 1992/4/1/entrez SP - 143 EP - 8 JF - Medical and veterinary entomology JO - Med Vet Entomol VL - 6 IS - 2 N2 - 1. Age composition, seasonal abundance and diel patterns of landing activity of the sylvan vector of yellow fever Haemagogus janthinomys Dyar were monitored weekly during 1981-82 by human collectors on the ground at Point Gourde in Chaguaramas Forest, 16 km west of Port of Spain, Trinidad. 2. Landing collections of Hg. janthinomys showed only diurnal activity, from 06.00 to 18.00 (sunrise to sunset, universal time), with a single peak of activity between 10.00 and 16.00 hours. 3. Densities of Hg. janthinomys were about 6 times greater during the wet season (May-November) than during the dry season (December-April); the annual Williams' mean landing rate on two collectors was 9.3 per day. 4. Monthly parous rates averaged 59% (range 0-86%) and some females were up to seven-pars. Retained eggs (range 1-21, mean 7.7/female) were found in the ovaries of 1.3% of landing females, all of which had stage I ovarian follicles for the next gonotrophic cycle. Hence blood-feeding is not inhibited by egg retention, which might promote transovarial transmission of virus. Implications of these findings are discussed in relation to yellow fever epidemiology. SN - 0269-283X UR - https://www.unboundmedicine.com/medline/citation/1358266/Seasonality_biting_cycle_and_parity_of_the_yellow_fever_vector_mosquito_Haemagogus_janthinomys_in_Trinidad_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0269-283X&date=1992&volume=6&issue=2&spage=143 DB - PRIME DP - Unbound Medicine ER -